I would have to say that all signs are pointing to this being Planescape Torment Enhanced Edition, unless this is the biggest troll of all time.

Planescape: Torment is a cult classic, role-playing video game developed by Black Isle Studios and published by Interplay Entertainment. Released on December 12, 1999, the game takes place in locations from the multiverse of Planescape, a Dungeons & Dragons fantasy campaign setting. The game’s engine is a modified version of the Infinity Engine, which was used for BioWare’s Baldur’s Gate, a previous D&D game set in the Forgotten Realms.

Planescape: Torment is primarily story-driven and combat is not prominently featured. The protagonist, known as The Nameless One, is an immortal who has lived many lives but has forgotten all about them, even forgetting his own name. The game focuses on his journey through the city of Sigil and other planes to reclaim his memories of these previous lives. Several characters in the game may join The Nameless One on his journey, and most of these characters have encountered him in the past or have been influenced by his actions in some way.